Concrete-mold.



JI. P.- GLAVINXE P. K. MORRISSEY.

CONCRETE MOLD. A APPLICATION FILED MAR. 9, 1910. y

'Patented May 16,*1911.

2 SHEBT-S-SEEET 2.

'UNITD STATES ,PATENT OFFICE.

' JOHN' F. GLAVIN .AND PATRICKK. MORRSSY, OF -RENSSELAER YORK.

CONCRETE-MOLD.

' Specification of Letters Patent.

Application led March 9, 1910. Serial No.' 548,276.

To all whom 'it may concern:

Be it known that we, JOHN F. GLAVIN and PATRICK K. MoRR1ssEY, both of Rensselaer, in the county of Rensselaer' and State of'New York, have invented certain new and useful Improvements .in Concrete Molds; and we do hereby declare the following to be a full, clear, and exactpdesc'ri'ptio'n of theinvention, such as will-enable others skilled in the art to which it appertains to make and fuse the same.

The primary object of this inventionis to .'provide improved simple and highly eiiitheir meeting ends.

spaces between the mold and the core to allow of the insertion of reinforcing bars, and

todo away with all eXtra parts which would l interfere -with the removal of the retaining frames, which latter are adjustable both longitudinally and transversely and are free from any direct attachment to either the mold or the core.

The invention will be forth and claims.

In the accompanying drawings, Figure l is a view in perspective of the vault mold. 'Fig 2 isa .fragmentary view showing the hereinafter fully set particularly pointed out in the corner of the mold and the members of the retaining frame. view of the members of the retaining frame of the core. Fig. l is a view in perspective of the cover mold. Figs. 5and 6 are, re-

' spectively,'longitudinal and transverse sec- 'tional views of the cover mold.

Referring to the drawings, l designates an external mold, which is shown as composed of four telescoping L-shaped 'sections of sheet metal, with their ends overlapping so as to permit of increasing or decreasing both the length and width of the mold. Themold sections are prevented from spreading by eX- ternal frames 2. lVe have vshown two of these frames, but more may be used if desired.- Each fra-me is composed of bars 3 extending longitudinally the full length of the mold, which bars at their ends are adjustal'ly connected by cross bars (i, equal at least to the full width of the mold, the connection being` preferably madeby nutted bolts passed through coincident openings",

Fig. 3 is avfragmentaryl cured on the outside .or reduced. `We

several openings bein formed in the bars at e also employ angle irons at the points of connection ofthe side and end bars to add to the strength of the frame at the corners of the mold. Each frame, thus composed, rests upon stops 5 se,- of the mold sections, and shown as consisting of angle plates. These frames are not attachedto the mold but merely rest on the4 seats. By adjusting the connectionsbetween the longitudinal side bars and the end bars the size *of the mold may be readily enlarged or reduced. `The upper retaining frame may be readily removed without loosening any bolt, while to. remove -thelower frame it is only necessary to loosen the bolts of Thevinternal mold 7, which forms the core, is likewise composed of a .series of L-Shaped telescoping sections of sheet metal'adjustable both longitudinally'and transversely. Thesesections on' their inner sides have seats 8 to accommodate retaining frames 9, which vare composed of longitudinal side bars approximately the full length of the core, and

L-shaped end bars which are adjustably connected together and. likewise connected to the side bars to allow the core to be enlarged preferably employ two inner frames, but more may be used if desired. The upper frame may be readily removed without loosening any bolt, but to effect theA removal of the lower frame it is necessary to disconnect the side bars at one end. There are no bars extending longitudinally or transversely across the mold or the core. In consequence not onlyl may the frames' be readily removed as stated7 but reinforcing redsv may be readily introduced into the cement without hindrance.

The cover mold 10 is-made up of four L- shaped telescoping sections of con'cavo-eon-- vex formation in cross-section, rounded at their corners, and capable of bemg adjusted relatively to one another both longltudlnally .and transversely. They are supported by legs l2 arranged on opposite sides, which legs are fastened to the L-shaped sections. These legs are of right angular formation, and each has a short horizontal portion at its upper end and an arc Iportion connecting the two right angular bars. The upper edge of the cover mold is surroundedv adjustableframe which is composed l. l' bars 53 paralleling the longitudinalsides` of the mold which bars are. of v:'-such length' that los ilo

they will also at least equalthe length'of the mold, and they are adjustably conshaped sections of concave-convex formation and roundedat their corners, said sections being adjustable both longitudinally and transversely and they are connected by cross braces 1G each of which is composed of two overlapping bars united by nutted bolts passed through coincident openings, the outer ends of said braces being curved 'to conform to the curvature of the L-shaped sections to which they are secured. The

frame for the core is composed of longitudinally extended bars 17, approximately the. adjustably connected length of the core, and to L-shaped end bars 18 which in turn are adjust-ably secured to the bars 17 to permitv of enlarging or reducing the size of the core.

When thel two cover molds are in position they are held in place as against expanding by cross bars 20 bolted to the respective frames and preferably also to the legs 12 by the same bolts that hold the bars 13.

In practice, the outer frames of the outer mold 1 and the inner frames vof the inner mold 7 are adjusted by properly positioning thenutted bolts, and the L-shaped sections composing the oute'body mold are properly positioned within the lower external and then the upper frame is dropped frame, in place. After the sections 4of the inner mold have been built up around its upper and lower frames this mold is placed within the outer mold and the apparatus is-then ready for the concrete to be poured between the two molds. In making the concrete cover the, outer mold is placed upon a smooth slab and the concrete poured in to about two inches. The inner mold is then ositioned and secured to the outer mold by cross bars 20. The concrete is then poured between the two molds. The operation takes but a very short time, and'dispenses with all troweling as ordinarily required. The cover will have round corners to materially add to its strength.l and being concaved necessitates less building up of the sides and ends of the vault.

" composed of longitudinal side right angular end ing of our invention will at It will be seen that the apparatus vmay be readily adjusted by changing only a few bolts. The longitudinal side bars of the retaining frames greatly enhance the strength thereof and render l'The advantages once be apparent.

' bracing unnecessary.

We claim as our invention 1. 'A cover mold composed of four L- shaped telescoping sections of cancavo-convex formation, adjustable both longitudinally and transversely, legs secured to said mold and having upper bearing surfaces adjacent to the upper edge of the mold, a frame secured to saidbearing surfaces of the legsand composed of longitudinal side bars each at least the full length of the mold, telescoping end bars composed each of two right angular members adj ustably connected'together and to said side bars, a core or inner mold composed of four L- shaped telescoping sections of concavo-conveit formation, adjustable both longitudinally and transversely, a frame therefor bars and bars adjustably connected together and to said side bars, and braces extending transversely of the core and connected to the sides thereof, said braces being composed of adjustably connected bars.

2. A cover mold composed of four L- shaped telescoping sections of concavo-convex formation, adjustable both longitudinally and transversely, right angular legs having arc shaped connecting portions secured to sides of the mold, a frame composed of longitudinal side bars attached to said legs, adjustably connected end members to which said side bars are adjustably connected, a core or inner mold"composed of four L-shaped telescoping sections of concavo-convex formation adjustable both longitudinally and transversely, a frame therefor composed of side bars and end bars adjustably connected together, the end bars being composed of adjustably connected members, and transverse brace bars extendacross both the inner and outer and adjustably connected to the longitudinal side bars on the frame of the outer mold.

In testimony whereof, we have signed this 'specification in the presence of two subscribing witnesses.

Witnesses: l

ADA L. Knaus,V MARY A. I-InrrNs-ann.

molds. 

